Three caveats surfaced during walkthrough lived only in the
conversation transcript before this commit. Now they live where
future agents and future-me will actually see them:
- reach_operation.m and reachability/README.md state prominently that
the current reach tube is an over-approximation of the LINEAR
model, not a sound tube for the nonlinear plant. Thesis-blocking
for a real safety claim. Upgrade paths documented.
- ctrl_heatup.m header and plant-model/CLAUDE.md note that the
feedback-linearization u_ff assumes exact alpha_f, alpha_c. Real
plants drift (burnup ~20%, boron ~10x, xenon). Robust treatment =
parametric reach with alpha as an interval.
- ctrl_heatup.m header and plant-model/CLAUDE.md note that sat() is
formally a 3-mode piecewise-affine sub-system. Operation-mode LQR
is dormant (trivially); heatup will need either a dormancy proof
or explicit hybrid modeling.
README.md top-level now has a run-commands table for the reach
artifacts and a pointer to the soundness status.
Hacker-Split: raise caveats from transcript to artifact so the work
is actually reviewable by people who weren't in the room.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Captures what landed, the model-validity / heatup / PID-vs-P findings,
why the quadratic Lyapunov barrier is fundamentally loose here (thin-
slab safety in anisotropic state space), why ReachabilityAnalysis.jl
needs state rescaling, and loose ends for the next session.
Hacker-Split: leave a clean handoff for Split's next wrap.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Folds three previously-separate pieces into one preliminary-example repo
for the HAHACS thesis:
- thesis/ (submodule) → gitea Thesis.git — the PhD proposal
- fret-pipeline/ — FRET requirements to AIGER controller (was
~/Documents/fret_processing/; prior single-commit history abandoned
per user decision)
- plant-model/ — 10-state PKE + lumped T/H PWR model (was
~/Documents/PKE_Playground/; never version-controlled before)
- presentations/2026DICE/ (submodule) → gitea 2026DICE.git
- reachability/, hardware/ — empty placeholders for Thrust 3 and HIL
- docs/architecture.md — how the discrete and continuous layers compose
- claude_memory/ — session notes and scratch knowledge pattern
Plant model refactored to thesis naming (x, plant, u, ref); pke_th_rhs
now takes u as an explicit arg instead of reading rho_ext from the
params struct. First two controllers built to the contract
u = ctrl_<mode>(t, x, plant, ref): ctrl_null (baseline) and
ctrl_operation (stabilizing, proportional on T_avg). Validated under a
100% -> 80% Q_sg step: ctrl_operation reduces steady-state T_avg drift
~47% vs. the unforced plant.
Root CLAUDE.md emphasizes that CLAUDE.md files are living documents and
that any knowledge not captured before a session ends is lost forever;
claude_memory/ holds the session-level notes that haven't stabilized
enough to graduate into a CLAUDE.md.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
